What does free check in baggage mean?

Related questions

1. How much money can you take overseas?
2. Are Etihad strict on baggage allowance?
3. Can I buy extra baggage on Etihad?
4. Can you bring food through customs?
5. Can you bring fruit on a plane?
6. Can I take hair straighteners in hand luggage?
7. Are wet wipes allowed on planes?
8. Is toothpaste considered a liquid when flying?
9. Can you fly with liquids in Europe?
10. What baggage allowance means?

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17. #mostly